Improvement in turn-tables



HENRY F. SNYDERl AND GEORGE S. SNYDER, OF WILLIAMSPORT, AND ANTESSNYDER, OF SPRINGDALE, PENNSYLVANIA.

y 'IMPROVEMENT IN TuRNTABLEs.

Specification formin g part of Letters Patent No. l 63,033, dated May11, 1875 application filed September 24, 1874.

To all whom it mayconcern:

Be it known that we, HENRY F. SNYDER and GEORGE S. SNYDER, ofWilliamsport, in

the county of Lycoming, and ANTEs SNYDER.,

of Springdale, in the county of Allegheny, and State of Pennsylvania,have invented certain Improvements in Railway Turn-Tables, of which thefollowing is a specication:

The invention relates to means for adjusting the conical rolls on whichthe table is supported. It is difficult in practice to so form and applya large number of rolls that each may be removed at will. I provide ameans for adjusting them firmly, and for easily removing them at willand replacing them.

The invention further relates to the construction of the parts at andnear the union of the long side beams or girders with the central plate.i

Figure l represents a vertical section on the line s s in Fig. 2. Fig. 2is a plan view, with a portion of the stout central casting or plateremoved.

Referring to the drawings, B B Sto., are conical rolls, mountedequidistant from each other in apertures in aturning frame, G. Thelatter is centered on a stout post, a, in the bed-casting A, and istapped to receive center-screws I J, which match with their conicalpoints into corresponding conical holes in the center ofthe ends of therespective rolls. Each screw I is tapped through a swell in the outerportion of the revolving frame O, and sets against and partly into thelarge end of the corresponding roll. When adjusted in the rightposition, it is rmly secured by a jamnut, z. Each screwJ is tapped intothe inner portion of the frame G, and its conical portion or point setsagainst and partly into the small end of the corresponding roll. Whenadjusted in the right position it is set by tightening the jam-nutj.

The centering-screws IJ, with their jamnuts for xing them firmly and forloosening and removing at will, allow the easy removal of a roll whennecessaryfor repairs or other purposes. I rst set the several rolls at auniform distance from the center, and, after working them a little underthe stout revolving plate D, carefully examine them to see if all bearequally. If a roller, B, is found to bear too small a proportion of theweight, it is adjusted a little inward toward the center post co byslackening both jam-nuts, turning both screw-centers J and I inward, andagain tightening the jam-nuts. The reverse adjustment is made if theroller, from the indications, appears to bear too much of the weight.

The screw-center J may be formed with a short length of a prismatic formbelow the cone, to allow it to be worked by a wrench when the jam-nut isslackened.

A stout overhang, D, at each. side of the central casting or plate D, iscored to receive the heads of the vertical bolts c, a series of which isemployed exactly in the center line of each of the girders M. Eachgirder is made in two halves faced together, and secured against lateraldisplacement at the lower edge by short bolts m, inserted through theflanges.

Directing attention to the right-hand side, G Gl G2 is a stout tie ofsound wrought-iron or steel. It is formed with a head, G1, at each end,a shank or body, G, with swells G2, and central holes therein to allowthe vertical bolts e to pass loosely through. These ties are sunk intocorresponding recesses, cored of proper size in the upper face of thegirder. The proper strain is thrown thereon by means of keys L drivenunder the heads.

The bosses or swells G2 arethick enough to provide the sanne, or alittle greater crosssectional area in the tie opposite the bolts e thanat other points.

The advantages of this improvement lie in the importance of directcentral resistance to the strains. There is no tendency to twist anypart by the elastic springing under a heavy load, or from anyothercause.

The bolts and ties may be made of any cross-section desired, and thethickening of the girder need be slight to perfectly accommodate them.

What we claim, and desire to secure by Let ters Patent of the UnitedStates, is-

1. In combination with a turn-table, the center-screws I J, matchingtheir conical points into corresponding holes in the ends of theanti-friction rolls B, and secured by jamf nuts t j, substantially asand for the purposes herein speoied.

2. A turn-table having the two parts of the girder M connected bylongitudinal ties having eyes G1, with vertical bolts e extendinglthrough such eyes, both sets offbolts exerting I their force in thecentral plane of the girder, substantially as and for the purposesspecified.

In testimony whereof we have hereunto set our hands this 18th day ofSeptember, 1874, in the presence of two subscribing Witnesses.

HENRY F. SNYDER. GEO. S. SNYDER. ANTES SNYDER. Witnesses:

WILLARD HEYLMUN, J. D. SNYDER.

